package com.scheuk.euler;

public class p008 {

	public static int findGreatestProduct(String input, int end)
	{
		int start = 0;
		char[] digits = new char[5];
		int result = 0;
		while (end < input.length())
		{
			input.getChars(start, end, digits, 0);
			int product = 1;
			for (int i = 0; i < digits.length; i++)
			{
				char c = (char)digits[i];
				if (c == '0') break;
				product *= Integer.parseInt(String.valueOf(c));
				System.out.print("[" + i + "]: " + c + " | ");
			}
			result = (product > result) ? product : result;
			System.out.println("product vs result - " + product + " ? " + result);
			start++;
			end++;
		}
		
		return result;
	}
	
	//answer is 40824
	public static void main(String[] args)
	{
		String value =
			"73167176531330624919225119674426574742355349194934"
			+ "96983520312774506326239578318016984801869478851843"
			+ "85861560789112949495459501737958331952853208805511"
			+ "12540698747158523863050715693290963295227443043557"
			+ "66896648950445244523161731856403098711121722383113"
			+ "62229893423380308135336276614282806444486645238749"
			+ "30358907296290491560440772390713810515859307960866"
			+ "70172427121883998797908792274921901699720888093776"
			+ "65727333001053367881220235421809751254540594752243"
			+ "52584907711670556013604839586446706324415722155397"
			+ "53697817977846174064955149290862569321978468622482"
			+ "83972241375657056057490261407972968652414535100474"
			+ "82166370484403199890008895243450658541227588666881"
			+ "16427171479924442928230863465674813919123162824586"
			+ "17866458359124566529476545682848912883142607690042"
			+ "24219022671055626321111109370544217506941658960408"
			+ "07198403850962455444362981230987879927244284909188"
			+ "84580156166097919133875499200524063689912560717606"
			+ "05886116467109405077541002256983155200055935729725"
			+ "71636269561882670428252483600823257530420752963450";
		
		long start = System.currentTimeMillis();
		System.out.println("answer: " + p008.findGreatestProduct(value, 5));
		System.out.println("time: " + ((System.currentTimeMillis() - start)/1000) + " s");
	}
	
}
